Inner tube



May 15, 1923. 1,455,038 H. F. BLEDSOE INNER TUBE Filed Jan. 16, 1922 2Sheets-Sheet 1 H. F. BLEDSOE INNER TUBE Filed Jan. 16. 1922 2Sheets-Sheet 2 I b0zaard Z? fizedso 7 7 (Maya/$22.

WITNESSE'S: ATTORNEY Fatented May 15, 1923.

STTES PATENT FFICE.

INNER TUBE.

Application filed January 16, 1922. Serial No. 529,755.

To all whom it may concern:

Be it known that I, HOWARD F. Bnnnson, a citizen of the United States,residing at Ellensburg, in the county of Kittitas and State ofWashington, have invented new and useful Improvements in Inner Tubes, ofwhich the following is a specification.

This invention has for its primary object, the provision of an innertube for pneumatic tires, and one which is constructed to minimize thepossibility of blowouts.

More specifically stated, the invention contemplates strengthening ofthe tube by the use of cord spirally wound about the tube and also abouta non-flexible annulus arranged to engage the inner circumference of thetube to prevent the latter from being ex-,

panded to its maximum extent, and to make it possible for the tube tomaintain whatever strain it is subjected to should the latter expandfrom wealmess.

- he nature and advantages of the invention will be better understoodwhen the fol-'- lowing detailed description is read in connection withthe accompanying drawings, the invention residing in the construction,combination, and arrangement of parts as claimed.

In the drawings forming part of this application, like numerals ofreference indicate similar parts in the several views, and whereinFigure 1 is a side elevation of a tube constructed in accordance withthe invention.

Figure 2 is an enlarged fragmentary view of the tube with the outerrubberized covering removed.

Figure 3 is a detail view of the non-flexible annulus.

Figure 4 is an enlarged transverse sectional view.

Referring to the drawings in detail, 10 indicates an inner tubeof anywellknown construction which has associated therewith which is arrangedto engage the inner periphery or clrcumference of the tube 10. Inadditlon to the annulus 11, I also make use of cord, the size of thethread being that generally used in the ordinary cord tire fabric, andthe cord is wound spirally about the inner tube lOand the annulus 11,the cord being utilized to strengthen the tube as will be readilyunderstood; This cord is" eter of the cord windings as illustrated. In

addition to strengthening the tube by the cord windings, thenon-flexible annulus prevents the tube from being inflated. to itsmaximum degree, and also materially assists the tube in withstanding thestrain it might be subjected to should the tireexpand from weakness. Theconstruction is such, that the possibility of blow outs is reduced to aminimum.

While it is believed that from going description, the nature andadvantages of the invention will be readily apparent, I desire to haveit understood that I do not limit myself to what is herein shown anddescribed, and that such changes may be resorted to when desired as fallwithin the scope of what is claimed.

What I claim is:-

An inner tube of the character described comprising an inner wall ofrubber, a cord wound spirally around same, a rigid stri between the cordwinding and the inner wa l to fix the inner diameter of the tube anddetermine the outer periphery and an outer covering of fabric.

I In testimony whereof I aflix my signature.

* HOWARD F. BLEDSOE.

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